The replacement part is correct. The old sensor has been eaten through part of the way by the distorted dust shield on the axle. That actually must have been the reason for setting the code in the first place. The dust shield was pushed away from the CV housing and towards the hub because of rust-jacking. Exact same thing happened on my 2006 B9, on the left front. The dust shield simply needs to be lightly hammered in all around in order to restore the correct clearance from the sensor.